/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.antgroup.geaflow.cluster.common;

import com.antgroup.geaflow.common.utils.IdGenerator;

public class ExecutionIdGenerator {

    private static volatile ExecutionIdGenerator INSTANCE;

    private IdGenerator idGenerator;

    private ExecutionIdGenerator(int containerId) {
        this.idGenerator = new IdGenerator(containerId);
    }

    public static ExecutionIdGenerator init(int containerId) {
        if (INSTANCE == null) {
            synchronized (ExecutionIdGenerator.class) {
                if (INSTANCE == null) {
                    INSTANCE = new ExecutionIdGenerator(containerId);
                }
            }
        }
        return INSTANCE;
    }

    public static ExecutionIdGenerator getInstance() {
        return INSTANCE;
    }

    public long generateId() {
        return idGenerator.nextId();
    }

}
